/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemComponent.h
Removes GameplayEffect by Handle. StacksToRemove=-1 will remove all stacks.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, BlueprintAuthorityOnly, Category=GameplayEffects) virtual bool RemoveActiveGameplayEffect ( [FActiveGameplayEffectHandle](API\Plugins\GameplayAbilities\FActiveGameplayEffectHandle) Handle, int32 StacksToRemove )